Traction-engine



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. TRACTION ENGINE.

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v UNITED STATES PATENT OFFIC I HENRY D. SMITH AND FRANCIS M. WALKER, or NEWARK, OHIO.

TRACTION-ENGINE.

SPECIFICATION forming part of Letters Patent No. 379,996, dated March 27, 1888.

Application filed January 14, 1888. Serial No. 260,731.

To aZZ whom it may concern:

traction-engine driving-gear-such as is shown in the Patent No. 357,431, issued February 8, 1887, to Francis'M. Walker-with a device by which it may have two different speeds and two different powers, so that in traveling uphill, for instance, the traction-engine, with the same speed of piston, may travel slower with increased power.

In the. accompanying drawings, Figure 1 represents a horizontal section of the frame of a traction-gearing such as is shown in the Fig. 2 is a vertical section through the'line xx in Fig. 1. Fig. 3 is a horizontal section of a modification. Figs. 4 and 5 are details showing moving boxes, whose object will be hereinafter more fully described.

Referring now to the details of the drawings, A represents the main frame of the traction-gear; B, the main axle thereof, running in boxes in said frame, which frame. also carries the counter-shafts G D. The shaft 0 carries on one end a pulley, E, which receives motion from a connection, preferably by means of a belt or chain, with the steam-engine, and its other end carries apinion, F, which meshes with the teeth of a wheel, G, and gives motion to the same. The wheel G is mounted on the shaft D, and carries a bevel-pinion, H, meshing with the bevel-wheels I J, also mounted on the shaft D, and operating in a manner Well understood, and therefore unnecessary to describe. K, which mesh with internal gearwheels formed with .or supported by the carryingwheels, (not'shown,) which are mounted on the main axle B.

All the parts so far described are substantially the same as those shown in the afore said Patent No. 357,431, except that the wheel G is formed with two sets of teeth, 9 and g,

The shaft D also carries the pinions (No model.)

while the corresponding wheel in the patent referred to has only one set of teeth.

To enable us to use the two sets of teeth on the wheel G, we so mount the shaft 0 that it is capable of a slight lateral motion, sufficient, however, to move the pinion F out of gear with the teeth 9 and into gear with the teeth 9, or the reverse, as desired. This we accomplish by means of a small truss-frame, L, which carries a sleeve, M, firmly secured on the central rod, 1, of said truss-frame, and supporting a bolt, N, on which a-,movable box, 0, carrying the shaft 0, rocks. The upper end of this box 0 carries an arm, 0, that is connected by a link, P, to a lever, Q, so that by' moving said lever Q in one direction the pinion F may be made to mesh with either the teeth 9 or g, as desired, and thus two different speeds and powers of the traction-engine may be obtained with the speed of piston.

We may sometimes dispense with the small truss-frame L by changing the position of the compensating gearing from the inside to the outside of the frame A, as shown in Fig. 3, in which case the sleeve M, carrying the box 0 and shaft O, issupported directly by frame B in the same manner as it is supported by the rod Z of the small truss-frame L in Figs. 1 and 2. While this plan may be used, we prefer that shown in Figs. 1 and 2, because the main portion of the gearing is inclosed in the frame A.

In order to allow of the movement of the pinion, and yet have a good bearing for the other end'of the shaft 0, we pivot the box R, (see Fig. 5,) supporting that end of the shaft,

upon the sleeve T, by which said box is se- 1. The combination, in a traction-engine, of

F, constructed and adapted to mesh with either set of teeth, substantially as described. 2. The combination, in a traction-engine, of the bevel-Wheels I J, the wheel G, carrying a bevel-pinion meshing with said wheels I J,

and having two sets of teeth, with the pinion the pinion F, the shaft 0, carrying said pinion,

F, the shaft 0, and the laterally-movingbox O, the laterally-moving box 0, the sleeve M, carcarrying' said shaft, substantially as described. 'rying said box, and the small trussframe L, I 5

3. The combination, in atraction-engine, of supporting said sleeve, all substantially as 5 the wheel G, having two sets of teeth and I shown and described.

mounted on the shaft D, carrying the pinions In testimony whereof we aflix our signatures K K, with the pinion F, the shaft 0, the laterin presence of two witnesses.

ally-moving box 0, the sleeve M, carrying HENRY D. SMITH.

said box, and the frame carrying said sleeve, FRANCIS M. WVALKER. iosubstantially as described. Vitnesses:

4. The combination, in a traction-engine, of L. BRADY HARRIS,

the wheel G, having two sets of teeth, with JAs. H. SMITH. 

